Configuration to better detect text-lines

[ghost]

@MhLiao What configuration do you recommend to better detect text-lines?

[MhLiao]

@deepseek Maybe add some anchors of extreme aspect ratios will be helpful.

[ghost]

@MhLiao PMTD uses these ratios (0.17, 0.44, 1.13, 2.90, 7.46)

Other than ASPECT_RATIOS is there anything else you'd recommend?

[MhLiao]

@deepseek Another suggestion is adding some tricks to enlarge the receptive field in the backbone, such as deformable convolution v2.

[ghost]

thanks